Perhaps you should try some spelling variations:
yihan guan » yan guan
long chain » long chemin, long grain
china law » china laws
gan guan » yan guan, quan guan, fan guon
law yang » liu yang, yao yang, dan yang
yang lin » yang jin, wang lin, yang li
long han » long thanh, long haul, jeong han

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yihan guan) OR (gan guan)) china law yang lin ((long han) OR (long chain)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang ((yihan guan) or (gan guan)) china law yang lin ((long han) or (long chain)) ;*.